Improvement in oscillating steam-engines



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Wim ess es MM Vw @QAM N.PETERS. PHOTQLITHOGRAPHER, WASHINGTON, 11CAISAAC NEWTON FORRES'IER,` OF BRIDGEPORT, CONNECTICUT.

Letters Patent No. 110,352, dated December 20, 1870.

. lIMPROVEMENT INOSCILLATING STEAM-ENGINES.

The Schedule referred to in these Letters Patent and making parl: of thesame.

ATo all whom it may concern Be it known that I, ISAAC NnwtrorrVFomcnstrnn, of Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful -Improvements inOscillating Steam-Engines, XVater- Engines, and Pumps, of Awhich ,thefollowing is a specicaton. Y

invention relates moreespecially to that class of machines known asoscillating steam-engines; it is kalso adapted to use as a pump forforcing water.

The object of the rst part of the invention is to facilitate the workingof the valves by the oscillation of the engine; and

' )Iy improvement 'consists in combining with the working cylinder aslide-valve, working transversely to the axis of the cylinder, andoperated by the oscillation ofthe cylinder ou its truuuious.

The object of the next part 'of my invention is to preventwear oftheface ofthe slide-valve, to keep it truly in line, and to prevent strainon the' valve-rod; and

The improvement consists in combining the slidevalve with the valve-rod,passing entirely through the valve-chest.

.lhe object of the next part of my invention is to operate theslide-valve, in a simple and direct man- Iner, by the oscillation of thevalve-chest on its trunnions; and

The improvement consists in combining au oscillating valve-chest, areciprocating slide-valve, andan oscillating yoke, connected with thevalve-stein to move the slidevalve.

`The object of the next part of my invention is to cause the valvequickly to open and close in order to open the valve widely at thecommencement of the stroke of the piston; and

The improvement consists in combining an oscillating working cylinder, aslide-valve, moving transversely to the bore of the cylinder in onedirection, and a valve-seat, moving in a direction opposite to that ofthe valve.

The object of the next part of my invention is to facilitate themanufacture ot' the cylinder, and also to afford access to the valveswithout removingr or disturbing the trunnions on which the cylinderoscillates; and

The invention consists in combiningT with thecylinder, a valve-seat, onwhich the trunnions are formed, or to which they are secured, and avalve-chest, so constructed that it may be removed from the valvescatwithout disturbing the cylinder, valve-scat, or truuuious.

Io further secure the object last described, the improvement consists incombining the bed-plate or frame, the valve-seat, oscillating outrunnions in the bed-plate, the cylinder, mouuted'on the valve-seat, the

valve-chest, the valve, and theoscillating yoke which moves the valve. v

The next part of my invention relates to the engine when used as aApump; its object is to prevent the concussion ot. the water iu theworking cylinder as the stroke is reversed; and y The improvementconsists in'inserting a cushion of India rubber or other equivalentelastic material in each end of the working cylinder, the elasticity ofwhich cushion lesseus the concussion of the water against thecylinder-heads as the stroke is reversed.

In the accompanying thawing, whichy shows so much of my improved engineas is necessary to illustrate the invention herein claimed- Figurel is aside elevation.

Figure 2, a plan or topview of the valve, the valvechest, and the partsbelow it, the valve-seat and truni nious heilig shown iu dotted lines.

Figure 3, a vertical central section through the enf gine, at rightangles with the truuuious.

Figure/1, a similar section through the truuuious.

rIhe workingcylimler A, instead of being east with trunnions, as usual,is cast as a simple cylinder, with the flange a2 and ports a al formedthereon.

A piston-rod, b, connects the piston-head B with a crank, in the usualway,

'Ihe valve-seat- C has hollow truunions, C1 C", formed on its sides andmounted in properjournais, D, ou the frame or bed-plate E. Thevalve-seat is provided with proper ports for the passage ofthe steam,and serves as a head for the cylinder.

The valve-chest F is arranged beneath the valveseat. I

rIhc plate or cover G for the valve-chest, the valvechest, thevalve-seat, and the cylinder are allfrmly clamped together, by throughbolts and nuts, f, in the usual way.`

The valve II slides on its seat in the usual way.

This valve is mounted on arod, I, which passes entirely through thevalve-chest, and moves freely, endwisc, through pipe-box bearings, c',en the chest.

rIhe ends of the valve-rod pass Ythrough the ends of a yoke, J, whichpasses around the valve-chest.

'A fork or notch, la, on this yoke, embraces a stop or cross-bar, K,onthe frame.

In operation, the steam enters the valve-seat through the trunnions Cl,and passes through the port c to the side of the valve opposite thecylinder; when the valve opens",` it passes alternately into theopposite ends ofthe cylinder, and moves the piston in the usual way.'lhe exhaust steam escapes .through the trunnions Ci. lhc valve isreciprocated by the oscillation ot' the valve-seat, and the yoke causesit to move in a direction opposite to that ot' the valve-scat,

l val ve-l'od.

The valve may be readily removed, for repairs, Sac., by taking off thevalve-chest cover and slacking the ,set-screw which secures the valve tothe rod, and withdrawing the rod from the valve-chest. This then allowsthefvalve-chest to be removed from the valve seat, whereby access may behad to the valve and valve-seat for repairs, and for other purposes.

-I have described my improvementY as a steam-engine; obviously, it wouldwork wellas a Water-engine, or as a pump. v

I do not broadly claim the combination of an oscil. lating cylinder witha reciprocating valve.

1 claim as my inventionl 1. lhe combination of the oscillating cylinderwith the slide-valve working transversely across the bore of thecylinder, these parts heilig constructed to operate in combination,substantially as hereinbefore set forth.

2. The combination of the oscillating valve-chest, the reciprocatingslide-valve, and the valve-rod extending entirely through the chest,these parts being constructed to operate in combination, substantially-Vas hereinbefore set forth.

3. The combination of the oscillating valve-chest, the reciprocatingslide-valve, and the oscillating yoke,

these parts `being constructed to operate in eombina- -the cylinder, andthe valve-seat, reciprocating in a direction opposite to that of themovement "of the valve, these parts being constructed to operate incombination, substantially as hereinbefore set forth.

5. The combination of the cylinder, the'valve-seat, having trunnions onwhich the cylinder oscillates, and the valve-chest, oscillating Ywiththe cylinder, these parts being constructed to operate in combination.substantially as hereinbefore set forth.

6. The combination of the bed-plate, the oscillating cylinder, thevalve-seat, the trunnions, the valve-chest, the valve, andthe-oscillating yokefall these partsbeing constructed to operate incombination substantially as' hereinbefore set forth.

7. The combination, withthe eylindeP-'of a pump or waterengine, ofelastic cushions at each end of the cylinder, to .deadenv the concussionv.of the' water on the cylinder-heads, as hereinbef'ore set forth. Y

In testimony whereof I have hereunto subscribed my name.

` I. N. FOR-BESTER.

NVitne'sses Jon. I. PEYTON, BALTIs Dn LONG.

